How to hide servlet path?

[Anthony Karta]

Hi all,

I have HTML form (JSP file) like below, the UpdateLogin servlet class is mapped in web.xml.

in UpdateLogin servlet, I forward the view to this JSP again, BUT... in the browser it shows http://host/time/servlet/UpdateLogin.do

and if the user hits http://host/time/servlet/UpdateLogin.do directly, it throws NULLPointerException because some parameters are not set.

TIA

    
JSP
<form action="servlet/UpdateLogin.do" method="post">

[Ulf Dittmer]

if the user hits http://host/time/servlet/UpdateLogin.do directly, it throws NULLPointerException because some parameters are not set.

The class should check for required parameters, and take appropriate action if some are missing.

[Sandeep Deb]

Agree with Ulf. Although you can hide the URL from the user, it's not a good solution. Instead, the recommended way is to harden your servlet to take care of exception conditions.

[Ben Souther]

It could be that your servlet only supports the POST method.
One solution is to implement a doGet method that forwards the user to the page that contains the form.

[Anthony Karta]

Originally posted by Ben Souther:
It could be that your servlet only supports the POST method.
One solution is to implement a doGet method that forwards the user to the page that contains the form.

Thanks to Ulf and Sandeep. But I prefer Ben's idea.

I can check the the input parameters but sounds clumsy in complex form. If I use struts or other frameworks (not sure which ones), do they have build-in mechanism to valdate user input?

thanks again.